I am not a native speaker of English. From what I learn, 'wh' questions in English should normally be like this:
Why should we believe you?
How did she participate in the massacre?
However, recently in TV shows (from US and UK) I often hear this:
We should believe you why?
She participated in the massacre how?
Of course, the latter form is still less common than the former. From the shows, I feel that it is used more often as a quick reply to some previous statement, and/or when the speaker has some attitude, and/or when the situation is urgent.
In a sense, the latter form is easier: it does not need an auxiliary or modal verb, and it keeps the word order of a normal declarative sentence.
- How often do you (who live in English-speaking countries) hear the latter question form?
- Is it a new form? (maybe a tendency for English grammar to become simpler?)
- Or have these two forms co-existed for long, just serving different functions?